Grinding and polishing machine capable of monitoring grinding amount through pressure sensor

Abstract

The utility model relates to a grinding and polishing machine, in particular to a grinding and polishing machine capable of monitoring grinding amount through a pressure sensor, which comprises a grinding and polishing head module, the grinding and polishing head module comprises a base and a loading rotating shaft capable of circumferentially rotating relative to the base and vertically sliding along the vertical direction, and the lower end of the loading rotating shaft is directly or indirectly connected with a sample clamping disc. The device is characterized in that the device further comprises a bridging block, one end of the bridging block is fixedly connected with the base through a screw hole, the other end of the bridging block is rotationally connected with the loading rotating shaft through a transfer hole, and the bridging block and the loading rotating shaft are axially fixed; the pressure sensor is mounted on the bridging block; the calculation module converts the pressure attenuation value transmitted by the pressure sensor into the corresponding grinding amount. According to the utility model, the structure of the grinding and polishing machine is improved, the real-time and accurate measurement of the grinding amount is realized by utilizing the pressure sensor, the control of the grinding process is improved, and the metallographic grinding and polishing efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to a grinding and polishing machine, in particular to a grinding and polishing machine which monitors the grinding amount through a pressure sensor. Background Art

[0002] The metallographic grinding and polishing machine is a key equipment specially used for preparing metal microscopic specimens. Its main function is to make the surface of the metal specimen reach an extremely high smoothness through the grinding and polishing process so as to facilitate metallographic analysis. However, in the prior art, there are certain limitations in real-time monitoring of the grinding amount of the specimen. Usually, the grinding amount can only be determined through subsequent measurements after the grinding and polishing machine stops running and the specimen is unloaded. The steps are cumbersome and inefficient, and real-time data during the grinding and polishing process cannot be provided. Therefore, the prior art has deficiencies in real-time monitoring and precise control of the grinding and polishing process, which affects the efficiency and accuracy of metallographic analysis.

[0003] The applicant previously had a Chinese invention patent with publication number CN112223067A, which disclosed a multi-purpose grinding and polishing machine that increases the control of the sample grinding amount. This machine is equipped with a lifting counter on the lifting frame, and the number of teeth turned by the lifting counting gear is used to indirectly reflect the grinding amount. However, in practical applications, especially in the metallographic grinding and polishing process, since the grinding amount is extremely small, usually at the micron level, this method based on the lifting counting gear cannot meet the requirements in terms of accuracy, and the lifting counter cannot obtain accurate measurement data.

[0004] Therefore, although the existing grinding and polishing machines have a certain grinding amount control function, their measurement precision and accuracy still need to be improved in application scenarios such as metallographic grinding and polishing that require extremely high precision. In order to solve this problem, the utility model aims to propose an improved grinding and polishing machine that can accurately measure or monitor the grinding amount of metallographic samples in the center pressure mode, thereby meeting the needs of high-precision grinding and polishing. Utility Model Content

[0005] In order to overcome the technical problem or one of the technical problems existing in the prior art, the utility model provides a grinding and polishing machine that monitors the grinding amount through a pressure sensor, and the technical solution adopted is:

[0006] A grinding and polishing machine that monitors grinding amount through a pressure sensor includes a grinding and polishing head module, wherein the grinding and polishing head module includes a base and a loading shaft that can rotate circumferentially relative to the base and can slide up / down in a vertical direction, the lower end of the loading shaft is directly or indirectly connected to a sample clamping disk, and the sample can be fixed in a guide hole opened on the sample clamping disk. The invention is characterized in that it also includes a bridging block, one end of the bridging block is fixed to the base through a screw hole, and the other end is rotatably connected to the loading shaft through a transfer hole, and the bridging block is axially fixed to the loading shaft; the pressure sensor is installed on the bridging block; and the calculation module converts the pressure attenuation value transmitted by the pressure sensor into the corresponding grinding amount.

[0007] Furthermore, the bridging block is a rectangular block as a whole, and the middle parts of the two side surfaces are recessed inward to form grooves; the pressure sensor is a strain type pressure sensor, and the strain gauge of the strain type pressure sensor is firmly adhered to the upper surface or lower surface of the bridging block and spans the groove.

[0008] Furthermore, an adjustment / protection screw sleeve is threadedly connected near the upper end of the loading shaft, the adjustment / protection screw sleeve has an upward opening and an inner cavity with multiple wave springs sleeved on the loading shaft, and conical washer pairs and needle roller thrust bearings are sequentially sleeved on the loading shafts above and below the corresponding bridge block; the uppermost wave spring abuts against the lower surface of the needle roller thrust bearing below the bridge block, and the lowermost wave spring abuts against the bottom wall of the inner cavity of the adjustment / protection screw sleeve; a locking nut is threadedly connected to the loading shaft above the upper needle roller thrust bearing.

[0009] Furthermore, a first motor with its axis in the vertical direction is fixed on the base, and a driving wheel is fixed on the output shaft of the first motor; a driven wheel is rotatably arranged on the base, and belts are wound around the driving wheel and the driven wheel; a roller is fixed on the bottom of the driven wheel, and a loading shaft that can slide up and down is provided at the center of the roller.

[0010] Furthermore, the lower end of the loading shaft is directly or indirectly connected to the sample holding disk, and a sample is fixed in each guide hole of the sample holding disk.

[0011] Furthermore, it also includes a lifting and pressurizing module, which includes a lifting plate fixedly connected to the base, a second motor and a screw with a vertical axis are fixedly arranged on the lifting plate, the output shaft of the second motor is fixedly connected to a driving synchronous pulley with a vertical axis, the upper end of the screw is fixedly connected to a driven synchronous pulley, and a synchronous belt is wound around the driven synchronous pulley and the driving synchronous pulley; a vertically arranged guide rail is fixedly arranged on the lifting plate, a slider is directly or indirectly fixedly arranged on a fixed frame fixedly connected to the body of the grinding and polishing machine, and the slider is slidably matched with the guide rail; the screw is threaded with a nut, and the nut is directly or indirectly fixed to the fixed frame.

[0012] Compared with the prior art, the beneficial technical effect of the utility model is: the utility model improves the structure of the grinder and polisher, uses a pressure sensor to achieve real-time and accurate measurement of the grinding amount, improves the control of the grinding process, and improves the efficiency and accuracy of metallographic grinding and polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure from another perspective.

[0015] Figure 3 yes Figure 1 sectional view of .

[0016] Figure 4 yes Figure 3 A partial enlarged view of .

[0017] Figure 5 It is a structural schematic diagram of the bridging block of the utility model.

[0018] Figure 6 The utility model is a structural schematic diagram of an adjusting / protecting screw sleeve, a conical washer pair and a needle roller thrust bearing. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with specific embodiments and drawings.

[0020] like Figure 1-6 A grinding and polishing machine for monitoring grinding amount by means of a pressure sensor is shown, comprising a grinding and polishing head module 100, wherein the grinding and polishing head module 100 comprises a base 101 and a loading shaft 122 which can rotate circumferentially relative to the base 101 and can slide up / down in a vertical direction, wherein the lower end of the loading shaft 122 is directly or indirectly connected to a sample holding disk 113, wherein a sample 300 can be fixed in a guide hole provided in the sample holding disk 113, and wherein the grinding and polishing machine further comprises a bridging block 102, wherein one end of the bridging block 102 is fixed to the base 101 by means of a screw hole 1022, and the other end is rotatably connected to the loading shaft 122 by means of a transfer hole 1021, and the bridging block 102 is axially fixed to the loading shaft 122; a pressure sensor is mounted on the bridging block 102; and a calculation module converts a pressure attenuation value transmitted by the pressure sensor into a corresponding grinding amount.

[0021] By installing the pressure sensor on the bridge block, the pressure changes of the grinding and polishing head module during the grinding and polishing process can be monitored in real time, thereby indirectly obtaining the data of the grinding amount in real time, reducing the time loss and sample damage risk caused by downtime measurement, and improving work efficiency. The grinding pressure attenuation value collected by the pressure sensor can accurately reflect the slight changes in the grinding amount, thereby greatly improving the measurement accuracy and meeting the needs of metallographic grinding and polishing at the micron level. The bridge block is fixed to the base at one end and rotatably connected to the loading shaft at the other end. This design allows the grinding and polishing head module to rotate and slide up and down easily, and ensures the stable installation of the pressure sensor, improving the structural stability and work efficiency of the device. The real-time acquisition of grinding amount data allows the system to adjust the grinding and polishing parameters according to the real-time feedback of the grinding amount, achieving more precise grinding and polishing control, thereby improving the quality of metallographic samples.

[0022] The bridging block 102 is a rectangular parallelepiped as a whole, and the middle parts of the two side surfaces are recessed inward to form a groove 1023; the pressure sensor is a strain type pressure sensor, and the strain gauge of the strain type pressure sensor is firmly attached to the upper surface or the lower surface of the bridging block 102, spanning the groove 1023. The bridging block is a rectangular parallelepiped as a whole, and the design is simple and clear. The design of the central groove conforms to the principles of mechanics, making the force transmission more uniform, and it is convenient to attach the strain gauge of the pressure sensor on its upper or lower part, making welding or fixing work easier to achieve. The use of a strain type pressure sensor can accurately capture tiny changes in pressure, thereby accurately calculating the grinding amount. By installing it on the surface of the bridging block, the pressure acting on the grinding and polishing head can be accurately received, thereby improving the accuracy of the measurement.

[0023] The upper end near the loading shaft 122 is threaded with an adjustment / protection screw sleeve 103, which opens upward and has a plurality of wave springs 104 sleeved on the loading shaft 122 in the inner cavity. Conical washers 105 and needle roller thrust bearings 106 are sleeved on the loading shaft 122 above and below the corresponding bridge block 102 in sequence; the uppermost wave spring 104 abuts against the lower surface of the needle roller thrust bearing 106 below the bridge block 102, and the lowermost wave spring 104 abuts against the inner cavity bottom wall of the adjustment / protection screw sleeve 103; the locking nut 109 is threaded on the loading shaft 122 above the upper needle roller thrust bearing 106. The adjustment / protection screw sleeve at the upper end of the loading shaft not only ensures the safety of the equipment during the grinding and polishing process, but also provides a convenient adjustment opportunity. Most importantly, it effectively prevents lubricating oil from penetrating into the interior of the equipment, ensuring the normal operation of the equipment and the working state of the internal precision accessories. The wave spring in the inner cavity ensures the continuous pressure of the loading shaft. The design of the tapered washer pair and the needle roller thrust bearing on the loading shaft enhances the stability of the equipment, especially when performing high-precision operations.

[0024] The base 101 is fixed with a first motor 112 with a vertical axis, and a driving wheel 111 is fixed to the output shaft of the first motor 112; a driven wheel 107 is rotatably arranged on the base 101, and a belt 110 is wound around the driving wheel 111 and the driven wheel 107; a roller 108 is fixed to the bottom of the driven wheel 107, and a loading shaft 122 that can slide up and down is arranged at the center of the roller 108. This structure enables the sample to be pressurized during the rotation process during the grinding and polishing operation.

[0025] It also includes a lifting and pressurizing module 200, which includes a lifting plate 202 fixedly connected to the base 101, a second motor 203 and a screw 204 with a vertical axis fixedly arranged on the lifting plate 202, an output shaft of the second motor 203 fixedly connected to a driving synchronous pulley 205 with a vertical axis, an upper end of the screw 204 fixedly connected to a driven synchronous pulley 206, and a synchronous belt 207 wound around the driven synchronous pulley 206 and the driving synchronous pulley 205; a vertically arranged guide rail 208 fixedly arranged on the lifting plate 202, a slider 209 directly or indirectly fixedly arranged on a fixed frame 210 fixedly connected to the body of the grinding and polishing machine, and the slider 209 and the guide rail 208 are slidably matched; the screw 204 is threaded with a nut, and the nut is directly or indirectly fixedly connected to the fixed frame 210. In this way, the sample clamping disc 113 can drive the sample 300 to rise and fall, and pressurization can be achieved when the sample presses against the grinding disc.

[0026] In the center pressurization mode, six samples 300 are fixedly mounted on the sample clamping plate 113. When the second motor 203 drives the lifting plate 202 to move downward relative to the fixed plate 210, the base 101 is also driven to move downward, thereby driving the entire grinding and polishing head module 100 to move downward. When the lower surface of the sample 300 on the sample clamping plate 113 contacts the grinding plate, the wave spring begins to accumulate force. After the pressure detected by the pressure sensor reaches the set force value, the base stops moving downward; grinding begins. As grinding proceeds, the pressure sensor detects that the set force value gradually decreases, and the second motor drives the lifting and pressurization module 200 to continue to move downward until it reaches the set force value and stops. The calculation module will convert the pressure attenuation value into the corresponding grinding amount in real time and display it on the display device.

[0027] The detailed description of the utility model is based on the embodiments, but it should be understood that the utility model is not limited to these specific embodiments. For those skilled in the art, various modifications or improvements can be made to the utility model based on the contents disclosed in this specification, and all these modifications or improvements should be included in the protection scope of the claims of the utility model.

Claims

1. A grinding and polishing machine for monitoring grinding amount by means of a pressure sensor, comprising a grinding and polishing head module (100), wherein the grinding and polishing head module (100) comprises a base (101) and a loading shaft (122) capable of rotating circumferentially relative to the base (101) and capable of sliding vertically upward / downward, wherein the lower end of the loading shaft (122) is directly or indirectly connected to a sample holding disk (113), wherein a sample (300) can be fixedly mounted in a guide hole provided in the sample holding disk (113), wherein: It also includes a bridging block (102), one end of the bridging block (102) being fixedly connected to the base (101) via a screw hole (1022), and the other end of the bridging block (102) being rotatably connected to the loading shaft (122) via a transfer hole (1021), and the bridging block (102) and the loading shaft (122) being axially fixed; a pressure sensor being mounted on the bridging block (102); and a calculation module converting a pressure attenuation value transmitted by the pressure sensor into a corresponding grinding amount.

2. A grinding and polishing machine for monitoring grinding amount by a pressure sensor according to claim 1, characterized in that: The bridging block (102) is a rectangular parallelepiped as a whole, and the middle parts of the two side surfaces are recessed inward to form a groove (1023); the pressure sensor is a strain type pressure sensor, and the strain gauge of the strain type pressure sensor is firmly adhered to the upper surface or the lower surface of the bridging block (102) and spans the groove (1023).

3. A grinding and polishing machine for monitoring grinding amount by a pressure sensor according to claim 1, characterized in that: An adjusting / protecting screw sleeve (103) is screwed to the upper end near the loading shaft (122); the adjusting / protecting screw sleeve (103) is opened upward and has a plurality of wave springs (104) sleeved on the loading shaft (122) in the inner cavity; a pair of conical washers (105) and a needle roller thrust bearing (106) are sleeved in sequence on the loading shafts (122) above and below the corresponding bridge block (102); the wave spring (104) of the uppermost layer abuts against the lower surface of the needle roller thrust bearing (106) below the bridge block (102); and the wave spring (104) of the lowermost layer abuts against the bottom wall of the inner cavity of the adjusting / protecting screw sleeve (103); and a locking nut (109) is screwed to the loading shaft (122) above the upper needle roller thrust bearing (106).

4. A grinding and polishing machine for monitoring grinding amount by a pressure sensor according to claim 1, characterized in that: A first motor (112) with an axial direction in a vertical direction is fixedly arranged on the base (101), and a driving wheel (111) is fixedly arranged on the output shaft of the first motor (112); a driven wheel (107) is rotatably arranged on the base (101), and a belt (110) is wound around the driving wheel (111) and the driven wheel (107); a roller (108) is fixedly arranged at the bottom of the driven wheel (107), and a loading shaft (122) capable of sliding up and down is arranged at the center of the roller (108).

5. A grinding and polishing machine for monitoring grinding amount by a pressure sensor according to claim 4, characterized in that: The lower end of the loading shaft (122) is directly or indirectly connected to the sample clamping disk (113), and a sample (300) is fixed in each guide hole of the sample clamping disk (113).

6. A grinding and polishing machine for monitoring grinding amount by a pressure sensor according to claim 1, characterized in that: The invention also comprises a lifting and pressurizing module (200), wherein the lifting and pressurizing module (200) comprises a lifting plate (202) fixedly connected to the base (101), a second motor (203) and a screw rod (204) whose axis is in a vertical direction are fixedly arranged on the lifting plate (202), an output shaft of the second motor (203) is fixedly connected to a driving synchronous pulley (205) whose axis is in a vertical direction, an upper end of the screw rod (204) is fixedly connected to a driven synchronous pulley (206), and a synchronous belt (207) is wound around the driven synchronous pulley (206) and the driving synchronous pulley (205); a vertically arranged guide rail (208) is fixedly arranged on the lifting plate (202), a slider (209) is directly or indirectly fixedly arranged on a fixing frame (210) fixedly connected to the body of the grinding and polishing machine, and the slider (209) and the guide rail (208) are slidably matched; the screw rod (204) is threadedly connected to a nut, and the nut is directly or indirectly fixedly connected to the fixing frame (210).

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